So, imagine the pig has a heavy collar and to reward the pig for walking forward you might remove the heavy collar.

所以，想象这头猪带着很重的项圈,作为对这头猪向前走的奖励,你可以把项圈拿掉。

耶鲁公开课 - 心理学导论课程节选

So, you reinforce the pig for walking forward and you punish the pig for walking backward.

那你就对这头猪向前走的行为给予强化,如果它向后退，你就惩罚它。

耶鲁公开课 - 心理学导论课程节选

Last week, Capt Jon Miller said he was looking forward to walking through Market Drayton.

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"You know, I think about the pictures of the young men and women that you'd see in the civil rights movement, you know, well-dressed, backs straight, walking forward into something they're doing for themselves, for their family members and for those that are yet unborn, and I try to think about that in the work that I do every single day here, " Strautmanis said.

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He said his father loved walking and had been looking forward to seeing the spring blossom around Stirling.

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